1 /* $NetBSD: cpu.h,v 1.185 2023/09/04 20:58:52 mrg Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cpu.h 5.4 (Berkeley) 5/9/91 35 */ 36 37 #ifndef _I386_CPU_H_ 38 #define _I386_CPU_H_ 39 40 #include <x86/cpu.h> 41 42 #ifdef _KERNEL 43 44 #if defined(__GNUC__) && !defined(_MODULE) 45 static struct cpu_info *x86_curcpu(void); 46 static lwp_t *x86_curlwp(void); 47 48 /* 49 * XXXGCC12 has: 50 * ./machine/cpu.h:57:9: error: array subscript 0 is outside array bounds of 'struct cpu_info * const[0]' [-Werror=array-bounds] 51 * 56 | __asm("movq %%gs:%1, %0" : 52 */ 53 #pragma GCC push_options 54 #pragma GCC diagnostic ignored "-Warray-bounds" 55 56 __inline __always_inline static struct cpu_info * __unused 57 x86_curcpu(void) 58 { 59 struct cpu_info *ci; 60 61 __asm("movl %%fs:%1, %0" : 62 "=r" (ci) : 63 "m" 64 (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_self))); 65 return ci; 66 } 67 68 __inline static lwp_t * __attribute__ ((const)) 69 x86_curlwp(void) 70 { 71 lwp_t *l; 72 73 __asm("movl %%fs:%1, %0" : 74 "=r" (l) : 75 "m" 76 (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_curlwp))); 77 return l; 78 } 79 80 #pragma GCC pop_options 81 82 #endif /* __GNUC__ && !_MODULE */ 83 84 #ifdef XENPV 85 #define CLKF_USERMODE(frame) (curcpu()->ci_xen_clockf_usermode) 86 #define CLKF_PC(frame) (curcpu()->ci_xen_clockf_pc) 87 #else /* XENPV */ 88 #define CLKF_USERMODE(frame) USERMODE((frame)->cf_if.if_cs) 89 #define CLKF_PC(frame) ((frame)->cf_if.if_eip) 90 #endif /* XENPV */ 91 #define CLKF_INTR(frame) (curcpu()->ci_idepth > 0) 92 #define LWP_PC(l) ((l)->l_md.md_regs->tf_eip) 93 94 #ifdef PAE 95 void cpu_alloc_l3_page(struct cpu_info *); 96 #endif /* PAE */ 97 98 #endif /* _KERNEL */ 99 100 #endif /* !_I386_CPU_H_ */ 101